Aerosol overcap



FIG. 1 is a top and right side perspective view of our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is top plan view thereof.

The bottom and interior of the overcap form no part of the claimed design. 

The ornamental design for an aerosol overcap, as shown and described. 